# -*- coding:utf-8 -*-
from Tkinter import *

def reg():
  s1 = e1.get()
  s2 = e2.get()
  t1 = len(s1)
  t2 = len(s2)
  if s1 == '111' and s2 == '222':
    c['text'] = 'success'
  else:
    c['text'] = 'failed'
    e1.delete(0,t1)
    e2.delete(0,t2)

root = Tk()
l = Label(root,text = '用户名：')
l.grid(row = 0,column = 0,sticky = W)
e1 = Entry(root)
e1.grid(row = 0,column = 1,sticky = E)
l2 = Label(root,text = '密码：')
l2.grid(row = 1,column = 0,sticky = W)
e2 = Entry(root)
e2['show'] = '*'
e2.grid(row = 1,column = 1,sticky = E)
b = Button(root,text = '登陆',command = reg)
b.grid(row = 2,column = 1,sticky = W)
c = Label(root,text = '')
c.grid(row = 3)
root.mainloop() 